Excavating dipper



arch 24, 1936.

L. E. YOUNIE EXCAVATING DIPPER Filed April 50} 1954 IN VEN TOR.

A TTORNEYS.

Patented Mar. 24, 1936 EXCAVATING DIPPER Application April 30, 1934, Serial No. 723,188

5 Claims.

In the use of excavating dippers, particularly those handled with a dipper stick, it is desirable to apply the actuating force to the dipper through a bail. Such bails have been used, but their attachment has been, by reason of the conformation of the bail, at the top of the dipper so as to avoid interference of the bail with any large fragment of material that might be picked up by the dipper. The present invention is designed to provide a bail which may be attached below the topof the dipper and still afford clearance for any solid material at the opening of the dipper. Features and details of the invention will appear from the specification and claims.

A preferred embodiment of the invention is i1- lustrated in the accompanying drawing as follows:-

Fig. 1 shows a side elevation of the dipper.

Fig. 2, a front view of the dipper.

Fig. 3, a front elevation of the side of the dipper bail.

Fig. 4, a side elevation of the side of the dipper bail.

Fig. 5, a front elevation of a top of a dipper bail.

Fig. 6, an end elevation of the top.

Fig. 7, an enlarged elevation of a securing pin for securing the pins of the bail.

1 marks the dipper, 2 the dipper stick, 3 the dipper arch, t the tooth lip of the dipper, and 5 the dipper door. These may be of usual construction.

A bail 6 is pivoted to the side walls of the dipper, preferably at the base of the arch 3 on pins '7, these pins being below the top of the dipper and preferably nearer the bottom of the dipper than the top and are also arranged at the front of the dipper.

The bail 6 has sides 8 and the connecting part, or top of the bail projects at a forwardly extending angle 9 from the sides 8 so that with the bail in most lifting positions the front of the dipper is unobstructed and consequently affords a stable support for an enlarged fragment, such as it. The top of the bail is provided with a fork Ha between which the securing part of the bail, of block I2 extends. The block is secured by a pin l3 extending through the sides of the fork. The usual cable M operates through the block.

The bail may be, for convenience of manufacture and servicing, formed in parts having a connecting portion II and sides [6. The side portions have the undercut, or dove-tail grooves l1 and the connecting portion has complementary dove-tail projections I8. These are adapted to be assembled, the parts having registering openings l9 adapted to receive a locking pin 20. The groove ll is preferably closed at 2| and is engaged by the top 22 of the projection 3 so that the lifting strain may be carried by this shoulder as distinct from the pin 2!]. While I prefer, under certain conditions to make the bail in parts, it will be understood that in the broader phases of the invention, this is not necessary.

With this construction it is feasible to attach the bail toward the bottom of the dipper, or at least well below the top. As a result when the dipper is in approximately horizontal position the lifting force from the cable is applied well out toward the dipper points and consequently a greater proportion of the load is carried by the dipper stick and cable and its operating mechanism is relieved to this extent of the load. Further the use of the bail is particularly desirable and preferable with an attachment well out to the sides of the dipper in that it steadies the dipper and relieves the dipper stick to a very large extent of twisting strains which have their effect on the stick itself and are detrimental in that they create friction between the dipper and its guiding means (not shown). The shape of the bail permits it to be brought well down toward the bottom of the dipper. The angle between the sides and the upper part of the bail and the length of the sides below the angle may be such as to leave an unobstructed front to the dipper as far as necessary to assure a stable support at the front for large pieces of rock throughout most, or all lifting positions of the bail, as desired.

What I claim as new is:

1. In combination with a dipper boom and lifting cable of a dipper rigidly secured to the-boom and having its cutting lip facing outwardly from the free end of the boom; and a bail having a cable hitch and being pivoted to the side walls of the dipper and below the top and at the dipper front, the bail being bent to the rear of a plane including the pivot of the bail and the cable hitch thereon, said cable hitch being connected with the cable, the bend of the bail positioning the sides of the bail to the rear of the front edges of the dipper to permit the engagement of material larger than the opening of the dipper with the front edges of the sides of the dipper as the boom is moved upwardly and outwardly.

2. In an excavating dipper, the combination of dipper side and bottom walls extending to the dipper opening and terminating in a lip at the bottom; a bail pivoted to the side walls below the top, the bail as a whole forming sides at an angle to a forwardly extending connecting portion; and a tongue and groove connection between the connecting portion and the side portions of the bail.

3. In an excavating dipper, the combination of dipper side and bottom walls extending to the dipper opening and terminating in a lip at the bottom; a bail pivoted to the side walls below the top, the bail as a whole forming sides at an angle to a forwardly extending connecting portion; and a dove tail tongue and groove connection between the connecting portion and the side portions of the bail.

4. In an excavating dipper, the combination of dipper side and bottom walls extending to the dipper opening and terminating in a lip at the bottom; a bail pivoted to the side walls below the top, the bail as a whole forming sides at an angle to a forwardly extending connecting portion, the end of the bail having dove-tail projections and corresponding dove-tail grooves on the side portions, said projections and the walls of the grooves having registering openings; and keys arranged in the openings.

5. In an excavating dipper, the combination of dipper side and bottom walls extending to the dipper opening and terminating in a lip at the bottom; a bail pivoted to the side Walls below the top, the bail as a whole forming sides at an angle to a forwardly extending connecting portion, the end of the ball having dove-tail projections and corresponding dove-tail grooves on the side portions, said projections and the walls of the grooves having registering openings, the projections and grooves having shouldered ends to receive the load thrust; and keys arranged in the openings.

LEWIS EDWARD YOUNJE. 

